This book presents and discusses current research in the study of chemical modelling. Topics discussed include chemical action and the transition state reactivity, algebraic chemistry of catalysis, solid-state polymerisation kinetics, fractal features of proteins structure and dynamics, modelling on methanol clusters, chemical hardness assessment of aromaticity for certain organic compounds, dependence of thermodynamic characteristics on spatial-energy parameter or free atoms and the scattering of particles and waves on nucleon nodes of the atom.